'£(7'K0t <>c d/*Jy-e, yj^f-d 
d^C*. ~C^o-z, «-^C< . — O^ -ir-v^f. >< / 7/^ f J 7 - - 
cJL-trv^i ; Tp^fjC^- ^ ■ y p./S^./d? "'. / - 2^ 
LAMNIDiE. 
429 /T7f^ &,c^v, 3 . 
^ - <^u5^»r ?j l? M) 
The following species have also been founded upon detached teeth, 
but there are no examples in the Collection :— 
0.*~&JJorax antiquus , E. E. Deslongehamps, Le Jura Normand, Mon. vi. 
(1877), p. 4, pi. i. figs. 4-5.—Lower Oolite; Normandy. 
Corcix incisus , Sir P. Egerton, Quart. Journ. Geo 1 . Soc. vol. i. 
(1845), p. 168, woodcut.—Upper Cretaceous ; Pondicherry, 
Madras, India. 
Corax Icevis , C. G. Giebel, Fauna d. Yorwelt, Eische, p. 371.— 
Turonian ; Quedlinburg, Prussia. 
Corax pygmcmts , G. von Miinster, Beitr. Petrefakt. vii. (1846), 
p. 19. Galeus pygmceus , G. von Munster, op. cit. v. (1842), 
p. 66.—Miocene ; Yienna Basin. [The generic position 
of this tooth is said to have been decided by microscopical 
examination.] 
The so-called Coraxfissuratus , T. C. Winkler (Archiv. Mus. Teyler, 
vol. iii. (1874), p. 299, pi. vii. fig. 4), from the Bruxellian Beds of 
Belgium, is founded upon a tooth of a Ganoid or Teleostean (see 
W. Dames, Ueber Ancistrodon , Debey, in Zeitschr. deutsch. geol. 
Ges. vol. xxxv. 1883, p. 655). 
A few teeth of doubtful Lamnidse, in form somewhat suggestive of 
t 
Cor ax , are named Xenodolamia , J. Leidy, Journ. Acad. Nat. Sci. i-ArJXu-fidviJL 
Philad. [2] vol. viii. (1877), p. 251. Two species are distinguished 
from the Ashley River Phosphate Beds, South Carolina :—A. pravus, \AATZCYA 
Leidy {tom. cit. p. 251, pi. xxxiv. figs. 33, 34) and X. simplex, j ^- - 
Leidy (tom. cit. p. 251, pi. xxxiv. figs. 35, 36). The following A 
specimens are also closely similar: — 
^ ( /^wua 
49954. Small tooth; Lower Chalk, Guildford. 3yj. Capron Coll] . 
~ P. 5813. Larger stouter tooth; Cenomanian, Saratov, Russia. 
£_y.O ' • ( ■ 
By exchange , 18887* /fta. 
S.f. 'h. ze> 
Genus CETOEHINUS, H. D. de Mainville^' A72? ' 
[Bull. Soc. Philom. 1816, p. 121.] 
Syn. Selache, G. Cuvier, Regne Animal, vol. ii. 1817, p. 129. 
Hannovera , P. J. van Beneden, Bull. Acad. Roy. Sci. Beige, [2] 
vol. xxxi. 1871, p. 504. 
f* 
Second dorsal fin and the anal very small. A pit at the root of 
the caudal fin; side of the tail with a keel. Gill-clefts very large 
and wide. Teeth very small, numerous, and conical, without lateral 
denticles, and rarely or never serrated. 
^ S % Jcn/9^y 
-2/^3 , 
^7"' ^ ^ ^ A t ^ • f 7- 
ii 
i 
